The most common fix for vod errors is to reset your cable box. Unplug the power for about 30 seconds and let it reboot. Try vod again.
It can also be your router even if you are connected to the net on your pcs. If the single cable box reboot doesn't fix it try rebooting your router. Unplug it 30 seconds plug it back in and wait for the internet light to go green and THEN reboot your cable box again.
If that doesn't work try to get the error code and share it with us or reach out to the verizon support chat or call in 888-553-1555.